Injecting device for diesel motors.



, READER.

INJECTING DEVICE FOR DIESEL MOTORS.

APPLIOATION IILED DEO. 12, 1911.

Patented Apr.29, 1913.

WWW/6m EMIL BADER, 0F NUREMBERG; GERMANY, ASSIGNOR TO MASCHINENFABRIK AUGSBURG-NfiRN'BERG A. G., 0]! NUREMBERG,

GERMANY.

INJEC'I'ING DEVICE FOR DIESEL MOTORS.

Specification of Letters Patent. Application filed December 12, 1911.

Patented Apr. 29 1913. Serial No. 665,340.

To all whom it may concern:

Be it known that I, EMIL BADER, a subject of the Empire of Germany, residing at Nuremberg, in the Empire of Germany, have invented a new and useful Injecting Device for Diesel Motors, of which the following is a specification.

Ordinary Diesel started by means of compressed air are usually so arranged, that the valve for injecting liquid combustible remains closed during the start, so as to prevent the compressed air irom entering the supply tube for the liquid combustible. This is effected in the manner that the gear for operating the injecting valve is withdrawn during the start, that is by shifting the fulcrum of the lever for operating the valve by means of an eccentric, whereby the transmission of motion from the res ective cam disk to the va-lve is interrupted y invention relates to improvements in valve gears for Diesel motors, whereby the shifting of the fulcrum of any lever is rendere unnecessary.

One improvement consists the injecting needle or valve with an annular piston, upon which the compressed air used for the injection of liquid combustible is permitted to act for opening the needle or valve.

Another improvement consists in providing two concentric helical springs bearing both with one end against some support and severally with the other end against a collar on the valve spindle and 'against a sleeve movable on the valve spindle. The sleeve is adapted to normally bear againsta second collar on the spindle and is pivotally connected with a the cam disk. Then thesleeve will normally transmit the pressure of the outer spring to the second collar on the valve spindle and on being operated from the cam disk it will remove this pressure-from the valve. The area of the annular piston and the pressure of the two helical springs are so adjusted, that the outer spring in conjunction with the inner spring can normally overcome the used forthe in ection upon the annular pisin providing 'ton and close the valve, while on the sleeve being operated from the cam disk the outer spring is rendered. inactive and the tension of the inner spring can be overcome bythe pressure of the compressed air upon the anmotors adapted to be 1 1s tightened b lever operated from i Both springs g and their upper ends against the bottom of a.

pressure of the compressed air nular-piston for opening the valve. During the start of the motor the supply of compressed air used for the injection is shut off, while the com ressed air used for startmg is prevented rom acting upon the annular piston, so that the valve remains closed.

I will now proceed to describe my invention with reference to the accompanying drawing, which represents avertical longi tudinal section through the improved injecting device, a part of the lever being 1shown in elevation and'the cam disk in outmes.

a is a valve spindle, the lower conical end.

6 of which serves as a valve and normally closes the nozzle 03. Above the valve 6; the nozzle widens to form a chamber 6, to which the mixture of liquid combustible and com,

pressed air is supplied through tubes 1, f

This supply is to be opened and shut off in any known manner. Within the chamber (1 the valve spindle a is provided with a shoulder 0 above the valve 6, which shoulder forms an'annular piston. The valve spindle y means of a suitable stuffing-box 9. Outside the latter the valve spindle a is provided with a collar 0 below and a shoulder 7' above. A loose collar 8 is put over the upper reduced part of the spindle a and made to bear against the shoulder j. A sleeve n integral with a cup p is put over the spindle a. This sleeve normally bears against the collar 0. Two concentric helical springs g and t are provided, of which the inner spring t is adapted to bear with its lower end against the loose collar 8 and the outer spring 9 is made to bear with its lower end against the bottom of the cup p. t are made to bear with second cup 1", which can be vertically adjusted by means of its exterior threaded portion 1' for instance, by inserting a tool within its opening u. This threaded portion 1' engages with a bracket or support at on the motor.

A bent lever h is mounted to rock on a pin- 2' on a supportm. This lever carries in its lower forked arm adapted to roll on the disk Z driven from the is provided with two opposite pins m, which engage in slots w in the horizontal portion periphery of a cam of the forked arm of the lever 71..

It will be understood, that during the threaded portion w of aa roller is, which is motor. "The sleeve n A ing the valve *6 work of the motor the lever h is by means of the roller k cam disk Z.

periodically rocked from the Normally the valve spindle a is subjected to the combined pressure of the .two springs g and t, which combined pressure is so adjusted as to be sulficient tor closwhile overcoming the pressure of the compressed air used for the inthe valve surface of the valve '6 can 'jection and admitted to the chamber 6 through the tube f and acting upon the annular piston '0. The inner s r ng t is so adjest-ed, that its tension can e overcome by the pressure of the compressed air up'onthe bustible to be injectedjnto the' cylinder (not The area of the lower surface of b is so adjusted, that the comadmitted to the cylinder for and acting upon the lower not open the latter, if the'supply of compressed air used for shown) pressed air starting the motor ;t-he injection and entering the chamber e through the tribe 9 is shut off. In general the pressure ofthe compressed air used for starting the mo'tor'is essentially smaller than th'e ssure of the compressed air used for .inje in the liquid combustible into the cyl- I inder. uring the start of the motor the supply of the compressed air for the injec tion requires to be shutoff. Then the valve b will remain closed during the start and n0 ;compressed air can enter the chamber e and act upon the annular piston a;

I claim:

1'. in a Diesel motor, in "combination, a

cylinder, a nozzle adapted to be connected with "the cylinder and comprising a chamber, 1

a s indle guided in said nozzle and reduced i in diameter at the inner end so as to form a valve iEOI closing the outlet of the nozzle,

- and a shoulder exposed to the pressure in .;the chamber,

means for supplying liquid combustible and compressed-air to the chamber of nozzle, said spindle having out- 1 side said nozzle two collars, two concentric helical springs surrounding said spindle and -severally bearing with their inner end 5 against the two collars of the spindle, a cup on said springs pressing them normally toi ward the tapered end of said s indle, and means operated from the motor or periodiically pressing the outer'spring away from the corresponding collar.

2. In a Diesel motor, in combination, a? cylinder, a nozzle adapted to be connected lever adapted to roll on with the cylinder and com'prisinga chamber, a spindle guided in said nozzle and reduced in diameter at the inner end so as to form a valve for closing the outlet of the nozzle, and a shoulder exposed .to the pressure in the chamber, means for supplying liquid combustible and compressed air to the chamber. of said nozzle, a stufling-box for tightening said spindle in said nozzle, said spindle having outside said stufling-box two collars, a sleeve movable'on said spindle between the two collars, a vertically adjustable cup, an inner helical spring surrounding said spindle between its outer collar andsaid 'cup, an outer helical spring surrounding said inner spring between said sleeve and said cup, for periodically moving said ,sleeve away from the inner collar of said spindle.

3. In a Diesel motor ,'in combination, a 'cylinder, a nozzle'adapted to be connected with the cylinder and comprising a chamber, a spindle guided in said nozzle and reduced in diameter at the inner end so as to form a valve for closing the outlet of the nozzle, and a shoulder exposed to the pressure in the chamber, a tube for supplying liquid combustible and compressed air to the chamber of said nozzle, a stuflin-g-box for tightening said spindle in said nozz'le,said spindle having outside said stufling-box two collars, a, sleeve movable on said spindle between the two collars, a vertically adjustable cup, an inner heli- {cal spring surrounding said spindle between its outer collar and said cup, an outer helical spring surrounding said inner spring t-ween said sleeve and said cup, a cam disk driven from the motor, a bent lever rocking on the frame of the motor and having forked arms, a'roller in one forked arm of said .the periphery "of said cam disk, and two opposite pins secured in said sleeve and engaging in slots in the other forked arm of said lever.

- 4:. In a Diesel motor, a cylinder, and an injecting device comprising essentially a valve with chamber, means fer supplying liquid combustible and compressed air to said chamber, a spindle with collar and close the,

sleeve on said collar adaptedto valve, two concentric helical springs around said spindle "one adapted to press the spindle normally downward "for closing I the valve,

and the other adapted to-press downward the sleeve on the collar'of the spindle, and a cam disk operated rocking-lever for periodically compressing the helical springs to open the valve. j j EMIL BAUER.

Witnesses:

OSCAR BOOK, RApPH W. Dox. 

